Armature for ignition-dynamos.



H. 3. VAN DEVENTER.

ARMATURE FOR IGNIHON DYNAMOS.

APPLICATION FILED Dc.2, 1914.

1,252,514. Patented Jag. 8,1918.

UNITED sTATEs PATENT oEEroE.

HARRY RANDOLPH VAN DEVENTER, OF SUMTER, SOUTH CAROLINA, ASSIGNOR, BY IMESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW

JERSEY, A CORPORATION OF NEW J EBSEY.

ARMATURE FOR IGNITION-DYNAMICS.

Specification of Letters atent.

Patented Jan. s, 191s.

Application filed December 2, 1914. Serial No. 875,104.

To allwltom z't may concern:

.Be it known that I, 'HARRY RANDOLPH VAN DEVENTER, a citizen of theUnited States, residing at Sumter, in the county of Sumter and State ofSouth Carolina, have invented certain new and useful Improvements inArmatures for Ignition-Dynamos, of ywhich the following is4 aspeciiication, reference being had to the accompanying drawing.

My invention relates to dynamos for ignition purposes, and has for itsobject the provision on the armature of'a collector ring that is simplein construction and adapted to be stamped vand formed from sheet metaland securely held in place by stamped pieces of insulation.

A further object is t0` provide a collector ring assembly in which aminimum number of-parts are used and the necessity for hand ttmg is to alarge extent eliminated.

Figure l is a view partly in section of a magneto generator, embodyingmy invention. Fig. 2 is a view partly in section of an armature headwith the collector ring in place. Fig. 3 is a modication of Fig. 2. Likefigures of reference denote the same parts wherever they are shown.

Heretofore, it has been customary to secure a piece of insulation to thearmature head, this insulation carrying a plain ring, this ring beingclamped in place by an outer insulating flange or being secured to theinsulation in some suitable manner. In this construction, a suitableconductor is connected to the ring and brought through the end plate,from which it is insulated by a suitable bushing or thimble. Such aconstruction is open to several objections, such as the necessity ofsecuring the insulation carrying the ring to the end plate, thenecessity of a bushing through the end plate and the necessity ofsecuring the ring to the insulation and the amount of hand fittingnecessary.v

All of these objections are eliminated by my construction, the preferredform of which is as follows 1 denotes a stub shaft having a shoulderindicated at 2, against which is placed one or more metallic washers 3,which form a support for the washer of insulating material 4, which fitstightly on the shaft and which is of the same diameter as the inter-vnal diameter of the collector ring 5 which is placed over and againstit, as shown. The hole through the collector ring for the shaft is ofgreater diameter than the shaft so that the collector ring is not incontact therewith, but is supported away from same by means of theinsulation 4.

Against the back of the cup-shaped collector ring is placed theinsulating washer 6 and against this the armature end plate 7.v

The projecting end of the shaft is now upset or otherwise securelyriveted over 7 as indicated at 8, whereby all of the foregoing parts arefirmly secured together to form the structure shown in Fig. 2.

While I have described the shaft 1 as having a shoulder, it is obviousthat the washers 2, 3 and 6 together with the head 7 may be simplypressed on the shaft,r but the preferred construction is the employmentof the shoulder 2 with the parts held together by the upset end 8. a

Fig. 3 shows `the modified form of the arrangement shown in Fig. 2 inwhich the flange on the collector ring is omitted same being simply afiat perforated disk as shown in which case the contact brush 12 may bearranged to engage the disk horizontally as shown in Fig. 3 instead ofvertically as shown in Fig. 1. Such an arrangement I deem within thescope of my invention.

To eliminate the necessity heretofore existing of bushing the end plate7 and leading a wire therethrough to connect with the collector 5, Iform an aperture in 7 adapted to accommodate a rearwardly extendingtongue 9, which is preferably formed integral with the collector 5. Theaperture in 7 is larger than 9 so the latter may pass without danger ofcontact, as 9 is rigid enough to be selfsupporting.

By reference to Fig. 1 showing `the armature with collector ring inplace, it will be evident that one end of the winding 10 is connected tothe frame of the armature at 11 and the other end of the winding, totongue 9 and that the circuit extends from the collector ring 5 to thebrush 12 to the terminal 13 and from there, 'to any suitable sparkproducing device, the circuit returning from said sparking device beingcompleted through the frame 14 of the magneto.

It will be observed that there are no pins, screws, small insulatingbushings or other members used in connection with this collector ringassembly; Furthermore that the Various parts are stamped and thereforeof correct size in relation to eac-h other, so that they are easily andaccurately assembled with a minimum of hand fitting.

And it Will bevunderstood that the magneto herein shown is merely forthe sake of `illustratio'n'and that my improved collector ring assemblymay be employed in any other form of magneto wherein a suitable terminalbrush is supported in contact relation with said ring.

Having thus described my invention, I claim l. An armature comprising acore and Winding, an end plate secured to said Core, a shaft secured tolsaid end plate, and an insulated collector clamped to said shaft by saidend plate.

2.' An armature comprising ay core and Winding, an end plate secured tosaid core, a shaft secured to said' end plate and an insulatedcollectorclamped to said shaft by said end plate and having an inwardlyprojecting integral tongue.

3. An armature comprising a 'core and Winding, and an end plate securedto said core, a shaft secured to said end plate, a flanged collectorsurrounding said shaft, an insulated disk between said collector saidend plate, a second insulating` disk With- 'in the flanged portion ofsaid collector serving to position the'same on said shaft, and means forclamping said disks and collector to said end plate, said meansincluding a shoulder on said shaft. y

4. An armature comprising a core and Winding, an end plate secured tosaid core, a shaft secured to `said end plate, a collector rinosurrounding said Shaft, insulating dis is on each side of said ring, andmeans for clamping said shaft, collector ring, disks, and end platetogether, said means including a shoulder on said shaft.

5. An armature shaft having a bearing portion and a shouldered portionof less diameter than the bearing portion, a collector comprising acentrally apertured cup-shaped metallic member, insulating members oneach side of said member, an end plate having a central aperture adaptedto receive the shouldered portion of said shaft, and means whereby allof the 'foregoing elements are clamped together, substantially asdescribed.

In testimony whereof I hereunto aliX my' signature in the presence oftWo Witnesses.

HARRY RANDOLPH VAN DEVENTER.

Witnesses:

EDNA B. IsLER, E. H. RHAME.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, I). C.

